PT91504B - Processo aperfeicoado para a obtencao de compostos de ta e/ou nb isentos de impurezas a partir de materiais contendo estes metais - Google Patents
Processo aperfeicoado para a obtencao de compostos de ta e/ou nb isentos de impurezas a partir de materiais contendo estes metais Download PDFInfo
- Publication number
- PT91504B PT91504B PT91504A PT9150489A PT91504B PT 91504 B PT91504 B PT 91504B PT 91504 A PT91504 A PT 91504A PT 9150489 A PT9150489 A PT 9150489A PT 91504 B PT91504 B PT 91504B
- Authority
- PT
- Portugal
- Prior art keywords
- leaching
- tantalum
- niobium
- extraction
- acid
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 title claims description 10
- 239000002184 metal Substances 0.000 title claims description 10
- 239000000463 material Substances 0.000 title claims description 9
- 150000002739 metals Chemical class 0.000 title claims description 9
- 239000012535 impurity Substances 0.000 title claims description 8
- 150000001875 compounds Chemical class 0.000 title description 6
- 239000010955 niobium Substances 0.000 claims abstract description 56
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 41
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 37
- 238000002386 leaching Methods 0.000 claims abstract description 24
- 239000002253 acid Substances 0.000 claims abstract description 23
- 238000000605 extraction Methods 0.000 claims abstract description 19
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 19
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims abstract description 8
- 238000000638 solvent extraction Methods 0.000 claims abstract description 8
- 239000008346 aqueous phase Substances 0.000 claims abstract description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 5
- 238000000622 liquid--liquid extraction Methods 0.000 claims abstract description 5
- 239000011707 mineral Substances 0.000 claims abstract description 5
- 238000000746 purification Methods 0.000 claims abstract description 5
- 238000001354 calcination Methods 0.000 claims abstract description 4
- 239000012074 organic phase Substances 0.000 claims abstract description 4
- 150000002822 niobium compounds Chemical class 0.000 claims abstract description 3
- 238000001556 precipitation Methods 0.000 claims abstract description 3
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 12
- 229940093635 tributyl phosphate Drugs 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000012071 phase Substances 0.000 claims description 7
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 4
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000000460 chlorine Substances 0.000 claims description 4
- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 3
- 150000001805 chlorine compounds Chemical class 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910003556 H2 SO4 Inorganic materials 0.000 claims description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims description 2
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 150000001408 amides Chemical class 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 229940043265 methyl isobutyl ketone Drugs 0.000 claims description 2
- 150000002894 organic compounds Chemical class 0.000 claims description 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 2
- 150000003482 tantalum compounds Chemical class 0.000 claims description 2
- 239000012736 aqueous medium Substances 0.000 claims 1
- 229910002090 carbon oxide Inorganic materials 0.000 claims 1
- 239000010439 graphite Substances 0.000 claims 1
- 229910002804 graphite Inorganic materials 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000002609 medium Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 229910003638 H2SiF6 Inorganic materials 0.000 abstract 1
- 239000011260 aqueous acid Substances 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- ZEFWRWWINDLIIV-UHFFFAOYSA-N tetrafluorosilane;dihydrofluoride Chemical compound F.F.F[Si](F)(F)F ZEFWRWWINDLIIV-UHFFFAOYSA-N 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 4
- 239000003085 diluting agent Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 3
- 241000894007 species Species 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000658 coextraction Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000001033 granulometry Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000009853 pyrometallurgy Methods 0.000 description 2
- 230000007928 solubilization Effects 0.000 description 2
- 238000005063 solubilization Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 244000309466 calf Species 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- -1 fluoride ions Chemical class 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical class Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G35/00—Compounds of tantalum
- C01G35/003—Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/24—Obtaining niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G33/00—Compounds of niobium
- C01G33/003—Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/10—Hydrochloric acid, other halogenated acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/28—Amines
- C22B3/288—Quaternary ammonium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/306—Ketones or aldehydes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/32—Carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/38—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
- C22B3/384—Pentavalent phosphorus oxyacids, esters thereof
- C22B3/3846—Phosphoric acid, e.g. (O)P(OH)3
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8811643A FR2636939B1 (fr) | 1988-09-06 | 1988-09-06 | Procede perfectionne d'obtention de composes de ta et (ou) nb exempts d'impuretes a partir de materiaux contenant ces metaux |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PT91504A PT91504A (pt) | 1990-03-30 |
| PT91504B true PT91504B (pt) | 1995-05-31 |
Family
ID=9369758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PT91504A PT91504B (pt) | 1988-09-06 | 1989-08-22 | Processo aperfeicoado para a obtencao de compostos de ta e/ou nb isentos de impurezas a partir de materiais contendo estes metais |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0386205B1 (fr) |
| JP (1) | JPH03502116A (fr) |
| KR (1) | KR900702063A (fr) |
| AU (1) | AU620148B2 (fr) |
| BR (1) | BR8907079A (fr) |
| ES (1) | ES2016728A6 (fr) |
| FR (1) | FR2636939B1 (fr) |
| PT (1) | PT91504B (fr) |
| WO (1) | WO1990002823A1 (fr) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5853535A (en) * | 1991-01-28 | 1998-12-29 | Champion International Corporation | Process for manufacturing bleached pulp including recycling |
| DE4207145C1 (en) * | 1992-03-06 | 1993-04-29 | H.C. Starck Gmbh & Co Kg, 3380 Goslar, De | Hydro:methallurgical process for recovery of tantalum and niobium - by digesting material e.g. columbite ore with hydrofluoric acid followed by solvent extn. of formed fluoro:complexes |
| US5620936A (en) * | 1993-12-14 | 1997-04-15 | E. I. Dupont De Nemours And Company | Recovery of spent catalyst |
| EP0734354A1 (fr) * | 1993-12-14 | 1996-10-02 | E.I. Du Pont De Nemours And Company | Recuperation d'un catalyseur epuise |
| CN1097094C (zh) * | 1996-03-26 | 2002-12-25 | 卡伯特公司 | 从含不溶氟化物的Ta－Nb金属矿中增溶金属成分的方法 |
| JP4245899B2 (ja) * | 2002-06-04 | 2009-04-02 | キャボットスーパーメタル株式会社 | 金属の回収方法 |
| CN100554445C (zh) * | 2007-01-05 | 2009-10-28 | 中国科学院过程工程研究所 | 一种分离偏钽酸钾、偏铌酸钾混合物中钽和铌的方法 |
| KR101031985B1 (ko) * | 2009-03-27 | 2011-05-02 | (주)나인디지트 | 탄탈륨 광석으로부터 습식제련을 이용한 고순도 금속 화합물의 제조방법 |
| FR3040060B1 (fr) * | 2015-08-10 | 2017-08-11 | Centre Nat Rech Scient | Procedes d'extraction et de recuperation du tantale present dans une phase aqueuse acide au moyen d'un liquide ionique, et utilisation d'un tel liquide ionique pour extraire le tantale d'une phase aqueuse acide |
| KR20210107346A (ko) * | 2020-02-24 | 2021-09-01 | (주)에코리사이클링 | 탄탈륨의 회수 방법 |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB767038A (en) * | 1954-05-17 | 1957-01-30 | Atomic Energy Authority Uk | Improvements in or relating to extraction of niobium |
| US2953453A (en) * | 1958-06-20 | 1960-09-20 | Nat Distillers Chem Corp | Recovery of columbium values |
| US3112991A (en) * | 1960-03-28 | 1963-12-03 | Union Carbide Corp | Process for recovery of fluoride-free columbium and tantalum pentoxides from organic extracts |
| GB956614A (en) * | 1961-10-04 | 1964-04-29 | Derby Luminescents Ltd | Improvements in or relating to the extraction of metals |
| US3658511A (en) * | 1969-12-22 | 1972-04-25 | Kawecki Berylco Ind | Upgrading the tantalum and columbium contents of oxidic metallurgical products |
| US3712939A (en) * | 1971-03-29 | 1973-01-23 | Union Carbide Corp | Method for recovering tantalum and/or columbium |
| DE2435427A1 (de) * | 1974-07-23 | 1976-02-05 | Starck Hermann C Fa | Verfahren zur verarbeitung von tantalniob-haltigen schlacken und rueckstaenden |
| NZ181123A (en) * | 1975-06-30 | 1979-12-11 | Univ Melbourne | Treatment of mineralcontaining materials with an acid in the presence of fluoride ion |
| DE2927835A1 (de) * | 1979-07-10 | 1981-06-04 | Hermann C. Starck Berlin, 1000 Berlin | Verfahren zur rueckgewinnung von fluorwasserstoffsaeure und deponierfaehigen rueckstaenden bei der verarbeitung niob- und/oder tantal-haltiger rohstoffe |
| CA1144376A (fr) * | 1980-06-02 | 1983-04-12 | Gilles Legault | Procede de lixiviation d'un minerai de niobium et ou de tantale |
| BR8406916A (pt) * | 1983-05-25 | 1985-05-21 | Oabrand Pty Ltd | Extracao de metais de minerios |
| US4663130A (en) * | 1983-11-14 | 1987-05-05 | Cabot Corporation | Process for dissolving tantalum/columbium materials containing alkali metal impurities |
| JPS61146717A (ja) * | 1984-12-18 | 1986-07-04 | Sumitomo Chem Co Ltd | タンタルの精製方法 |
| FR2589885B1 (fr) * | 1985-09-27 | 1988-01-15 | Extramet Sarl | Procede de separation et de recuperation de metaux, dans des melanges de sulfures metalliques, tels que des minerais de plomb |
| JPS62241824A (ja) * | 1986-04-10 | 1987-10-22 | Sumitomo Chem Co Ltd | タンタルとニオブの分離精製方法 |
-
1988
- 1988-09-06 FR FR8811643A patent/FR2636939B1/fr not_active Expired - Lifetime
-
1989
- 1989-08-04 KR KR1019900700931A patent/KR900702063A/ko not_active Application Discontinuation
- 1989-08-04 WO PCT/FR1989/000410 patent/WO1990002823A1/fr active IP Right Grant
- 1989-08-04 AU AU41827/89A patent/AU620148B2/en not_active Expired - Fee Related
- 1989-08-04 EP EP89909572A patent/EP0386205B1/fr not_active Expired - Lifetime
- 1989-08-04 BR BR898907079A patent/BR8907079A/pt unknown
- 1989-08-04 JP JP1508975A patent/JPH03502116A/ja active Pending
- 1989-08-22 PT PT91504A patent/PT91504B/pt not_active IP Right Cessation
- 1989-09-05 ES ES8903026A patent/ES2016728A6/es not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ES2016728A6 (es) | 1990-11-16 |
| FR2636939B1 (fr) | 1991-08-30 |
| FR2636939A1 (fr) | 1990-03-30 |
| AU4182789A (en) | 1990-04-02 |
| JPH03502116A (ja) | 1991-05-16 |
| KR900702063A (ko) | 1990-12-05 |
| EP0386205B1 (fr) | 1993-04-28 |
| AU620148B2 (en) | 1992-02-13 |
| WO1990002823A1 (fr) | 1990-03-22 |
| BR8907079A (pt) | 1991-01-08 |
| EP0386205A1 (fr) | 1990-09-12 |
| PT91504A (pt) | 1990-03-30 |
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